T he PJ324 series are low-cost , quad operational.
ETC
PJ324M - Headphone Stereo jack/Audio connector
PJ324M Product Product Mode Operating Temperature Voltage Rating Colour Headphone Stereo jack/Audio connector/5PIN/TH PJ324M / 3.5mm -30℃ ~70℃ 500V .
Promax-Johnton Semiconductor
PJ324 - Quad Low Power Operational Amplifiers
T he PJ324 series are low-cost , quad operational amplifiers with true differential inputs. These have several distinct advantage over standard opera.